Re: cross platform alternative for signal.SIGALRM?

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From	Dennis Lee Bieber <wlfraed@ix.netcom.com>
Newsgroups	comp.lang.python
Subject	Re: cross platform alternative for signal.SIGALRM?
Date	Wed, 11 Nov 2015 19:42:57 -0500
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On Wed, 11 Nov 2015 17:06:46 +0000 (UTC), Ulli Horlacher
<framstag@rus.uni-stuttgart.de> declaimed the following:

>Marko Rauhamaa <marko@pacujo.net> wrote:
>> Ulli Horlacher <framstag@rus.uni-stuttgart.de>:
>> 
>> > What is the best practise for a cross platform timeout handler?
>> 
>> Here's the simplest answer:
>> 
>>    https://docs.python.org/3/library/threading.html#threading.Timer
>> 
>> (Also available in Python 2.)
>
>Hmmm... not so simple for me. My test code:
>
>from time import *
>import threading
>import sys
>
>def hello(): 
>raise ValueError("hello!!!")
>
	Indentation!

	If that is a cut&paste, you have defined a "hello" function that does
nothing, followed by immediately raising ValueError (so nothing below will
be executed)

>t = threading.Timer(3.0,hello)
>t.start()
>try:
>  print "start"
>  sleep(5)
>  print "end"
>except ValueError as e:
>  print e.args[0]
>  sys.exit(1)
>
>
>gives:
>
>
>start
>Exception in thread Thread-1:
>Traceback (most recent call last):
>  File "/usr/lib/python2.7/threading.py", line 551, in __bootstrap_inner
>    self.run()
>  File "/usr/lib/python2.7/threading.py", line 759, in run
>    self.function(*self.args, **self.kwargs)
>  File "x.py", line 7, in hello
>    def hello(): raise ValueError("hello!!!")
>ValueError: hello!!!
>

	But this indicates the thread stuff did run, so your copying into the
post is incorrect.

{Please take my post, then, as an advisory to take care when posting Python
code that the indentation is correct in the posted version -- not taking
such care has caused many wild-goose chases for other posters}
-- 
	Wulfraed                 Dennis Lee Bieber         AF6VN
    wlfraed@ix.netcom.com    HTTP://wlfraed.home.netcom.com/

Thread

cross platform alternative for signal.SIGALRM? Ulli Horlacher <framstag@rus.uni-stuttgart.de> - 2015-11-11 16:16 +0000
  Re: cross platform alternative for signal.SIGALRM? Marko Rauhamaa <marko@pacujo.net> - 2015-11-11 18:30 +0200
    Re: cross platform alternative for signal.SIGALRM? Ulli Horlacher <framstag@rus.uni-stuttgart.de> - 2015-11-11 17:06 +0000
      Re: cross platform alternative for signal.SIGALRM? Marko Rauhamaa <marko@pacujo.net> - 2015-11-11 20:03 +0200
        Re: cross platform alternative for signal.SIGALRM? Ulli Horlacher <framstag@rus.uni-stuttgart.de> - 2015-11-11 22:42 +0000
      Re: cross platform alternative for signal.SIGALRM? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2015-11-11 19:42 -0500
  Re: cross platform alternative for signal.SIGALRM? Terry Reedy <tjreedy@udel.edu> - 2015-11-11 20:37 -0500
    Re: cross platform alternative for signal.SIGALRM? Marko Rauhamaa <marko@pacujo.net> - 2015-11-12 08:14 +0200
      Re: cross platform alternative for signal.SIGALRM? Christian Gollwitzer <auriocus@gmx.de> - 2015-11-12 07:43 +0100
        Re: cross platform alternative for signal.SIGALRM? Chris Angelico <rosuav@gmail.com> - 2015-11-12 18:37 +1100
        Re: cross platform alternative for signal.SIGALRM? Terry Reedy <tjreedy@udel.edu> - 2015-11-12 05:15 -0500
        Re: cross platform alternative for signal.SIGALRM? Chris Angelico <rosuav@gmail.com> - 2015-11-12 22:38 +1100
        Re: cross platform alternative for signal.SIGALRM? Terry Reedy <tjreedy@udel.edu> - 2015-11-12 09:01 -0500
      Re: cross platform alternative for signal.SIGALRM? Ulli Horlacher <framstag@rus.uni-stuttgart.de> - 2015-11-12 07:22 +0000
        Re: cross platform alternative for signal.SIGALRM? Marko Rauhamaa <marko@pacujo.net> - 2015-11-12 10:15 +0200
    Re: cross platform alternative for signal.SIGALRM? Ulli Horlacher <framstag@rus.uni-stuttgart.de> - 2015-11-12 06:58 +0000
  Re: cross platform alternative for signal.SIGALRM? Cameron Simpson <cs@zip.com.au> - 2015-11-12 16:20 +1100

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